<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="popup.css">
    <script type="module" src="popup.js"></script>
</head>
<body>
    <h1></h1>
    <p><strong></strong></p>
    <button>切换</button>
</body>
</html>
